Shuttleless loom for weaving



July 21, 1931. o. SHIMWELL 1,815,118

SHUTTLELESS 1100M FOR WEAVING Filed May 19, 1930 WW Min/ Patented July 21, 1931 srA'rEs P TENT OFFICE OLIVER SHIMWELL, OF MANCHESTER, ENGLAND, ASSIGNOE TO GAWSWORTH PATENTS LIMITED, OF MANCHESTER, ENGLAND, A BRITISH COIVIPANY, AND PLATE BROTHERS & COMPANY LIMITED, 0F OLDHAIVI, ENGLAND, A BRITISH COMPANY I SHUTTLELESS LOOM FOB, wnnvrne Application filed May 19, 1930, Serial No. 453,787, and in Great Britain July 4, 1829.

This invention relates to shuttleless looms for weaving and particularly to the weft carriers by which the weft threads are transferred into the warp threads.

In the specification of prior Patent No. 1,574,125, a weft carrier is described and claimed in which the weft threads are directed by hook-like parts upon the carrier to the underside of the latter so that the weft carrier acts to press or iron the weft threads upon the warp threads.

In connection with heavy yarns such as jute yarn and heavy cotton or other yarn, it is found in practice that the weft threads are frequently not pulled or tightened sufficiently by the weft carrier, with the result that loose loops are formed at the selvedge and if weft detectors are employed which are disposed in the cloth or in the warp threads, knocking-01f occurs due to the weft threads being out of position and not under the detector forks.

The object of my present invention is to provide simple and eflicient means for drawing the weft threads into the warp threads in such a way as to produce a tight selvedge and to bring the said threads beneath the detector forks.

In accordance with my invention, the underside of a weft carrier arranged as described in the specification of the aforesaid patent is undercut or recessed at one side for a portion of its length at the points where the raceways down which the weft threads are diverted to the underside of the carrier, open at such underside. WVith such construction of carrier, I find that there is no press ing or ironing of the weft threads upon the warp threads until the carrier has travelled some distance through the shed and the weft thread has been pulled tight to produce a tight selvedge. The weft thread is then drawn under the unrecessed part of the carrier and is ironed on to the warp threads so that they adhere to one another.

The undercutting or recessing of the underside of the weft carrier extends between the points where the raceways open at the underside of the carrier.

Referring to the accompanying sheet of explanatory drawings Figure 1 is an elevation, Figure 2 a plan View, Figure 3 an inverted plan view and Figure 4 a cross sectional view on the line A B of Figure 1 showing a weft carrier constructed in accordance with my invention.

The weft carrier a has a groove or channel Z) therein into which the weft thread to be carried through the shed is depressed so that it is engaged by one or other of the projecting parts or hooks 0, 0? according to the direction of travel of the carrier. The thread is directed down one or other of the slits or raceways e, f to the underside of the carrier. It will be noted that the portion 9 of the underside of the carrier between the bases of the slits or raceways c and f is cut away or recessed so that if the weft thread is beneath the carrier at such recessed or cut away part it is not ironed or pressed on to the warp threads. If the carrier is travelling from left to right in Figure 1, the hook 0 will engage the weft thread and direct it down the slit or raceway e to the underside of the carrier. But no ironing of the weft thread will take place until it has been pulled straight and the portion of the carrier beyond the slit or raceway f has passed over it.

What I claim is:

1. A weft carrier for shuttleless looms comprising a body part, two weft thread engaging hooks facing in opposite directions secured to the said body part, means whereby the thread engaged by said hooks is directed beneath the said body, and a recess in one side of the underside of the body part extending lengthwise of the latter adjacent to the places where the thread issues at said underside.

2-. A weft carrier for shuttleless looms comprising a body part, two weft thread engaging hooks facing in opposite directions at the upper surface of the said body, means consisting of raceways directing the threads engaged by the hooks beneath the said body part, and a recess in one side of the underside of the carrier at the polnts where the said raceways emerge at the said underside, the

said recess extending lengthwise of the body part.

3. A Weft carrier for shuttleless looms comprising a body part having a Weft thread groove extending along one side of its upper surface, two Weft thread engaging hooks facing in opposite directions at the other side of said upper surface, raceWays extending to the underside of said body part to direct the thread engaged by the hooks to a position beneath the said body part, and a recess arranged in the underside of the body part longitudinally of the latter adjacent to the points Where the threads issue at the underside of the body part.

In testimony whereof I have signed my name to this specification.

OLIVER SHIMWELL. 

